POS Software that works with RFID

Hi All,

I'm after a POS Software solution where users can either have a credit card number on file or a positive balance by putting money on their account and they can make purchases at the pos by using their RFID card which is issued to them.

Then our accounts team can make the payments at the end of the event or refund cash not used.

Sort of like when you go on a cruise and you use your room card.
Does anyone have any ideas of where I can get software like this? It's for a not-for-profit so I don't want to pay too much and would only be used on 1 terminal which is a standard pc with an rfid reader.